Designation:B649−17StandardSpecificationforNi-Fe-Cr-Mo-Cu-NLow-CarbonAlloys(UNSN08925,UNSN08031,UNSN08034,UNSN08354,andUNSN08926),andCr-Ni-Fe-NLow-CarbonAlloy(UNSR20033)BarandWire,andNi-Cr-Fe-Mo-NAlloy(UNSN08936)Wire1ThisstandardisissuedunderthefixeddesignationB649;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversnickel-iron-chromium-molybdenum-copper-nitrogenalloys(UNSN08925,UNSN08031,UNSN08034,UNSN08354,andUNSN08926),andchromium-nickel-iron-nitrogenlow-carbonalloy(UNSR20033)barandwire,andnickel-chromium-iron-molybdenum-nitrogenalloy(UNSN08936)wire.1.2ASTMInternationalhasadopteddefinitionswherebysomegrades,suchasUNSN08904,2previouslyinthisspecificationwererecognizedasstainlesssteels,becausethosegradeshaveironasthelargestelementbymasspercent.SuchgradesareundertheoversightofASTMCommitteeA01anditssubcommittees.TheproductsofN08904previouslycoveredinthisspecificationarenowcoveredbySpecificationsA479/A479MandA484/A484M.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.ItistheresponsibilityoftheuserofthisstandardtobecomefamiliarwithallhazardsincludingthoseidentifiedintheappropriateSafetyDataSheet(SDS)forthisproduct/materialasprovidedbythemanufacturer,toestablishappropriatesafety,healthandenvironmentalpractices,anddeterminetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganization...
